... juvenile of the year or an adult bird . Proceed as follows : ( a ) If the tip of the tail - feather is normally ... Pintail and Wood Duck , all juveniles probably wear the juvenile tail until late in August ; all Mallards and Black ...
... juvenile mortality must take into considera- tion all factors that destroy eggs , nests , fe- males , or ducklings ... pintail females to move their broods from pond to pond and to send them scattering to the uplands at the first ...
... juvenile Pintail hens , for example , 13 per cent came back to Delta to be individually recorded ( by leg bands ) on the small pond where they were raised . Sowls discovered the nests of 8 of these young females only a short distance ...
... duck . Ecological Modelling 38 : 257-275 . Kirsch , L. M. , H. F. Duebbert , and A. D. Kruse . 1978 . Grazing and ... juvenile , brood hen , and post - breeding pintails in North Da- kota . Condor 79 : 504-507 . Lokemoen. ,. J. T ...
... juvenile mortality must take into considera- tion all factors that destroy eggs , nests , fe- males , or ducklings ... duck has survived the egg- laying and incubating periods , has hatched her eggs , and has led the ducklings ...